(2011•徐汇区二模)我们能分辨出不同乐器发出的声音,主要是依据它们发出的声音 发布时间:2017-05-02 16:26 │ 来源:www.tikuol.com 题型:选择题 问题: (2011•徐汇区二模)我们能分辨出不同乐器发出的声音,主要是依据它们发出的声音具有不同的( )A.响度B.音调C.音色D.频率
题型:选择题 She could feel her heart beating fast and meanwhile her face _____ red when she was made to speak before so many people for the first time.A. went B. came C. grew D. got 查看答案
题型:选择题 估计下列溶液中溶质的质量分数最大的是:A.4.6gNa投入45.4g水中B.7.8gNa2O2投入42.2g的水中C.6.2gNa2O投入43.8g的水中D.8gNaOH投入42g水中 查看答案